Question
37 of a packet of marbles were black. 34 of the remaining marbles were grey and the rest were white. If there were 30 more grey marbles than white marbles, how many marbles were there in the packet altogether?
4 m

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37 of a packet of marbles were black. 34 of the remaining marbles were grey and the rest were white. If there were 30 more grey marbles than white marbles, how many marbles were there in the packet altogether?